Res Ipsa Loquitur

Latin for 'the thing speaks for itself,' Res Ipsa Loquitur is a rule of evidence in tort law that allows for the presumption of negligence on the part of the defendant derived directly from the very nature of the accident.
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Definition

Res Ipsa Loquitur is a legal doctrine used in tort law, specifically in cases of negligence. It allows the presumption of negligence to be made based on the very nature of the accident, under circumstances where:

  1. The accident or injury would not ordinarily happen without negligence.
  2. The instrumentality causing the harm was under the exclusive control of the defendant.
  3. The plaintiff did not contribute to the cause of the injury.

This rule shifts the burden of proof to the defendant, who must then introduce evidence to counter the presumption of negligence.

Examples

  • Medical Malpractice: A surgical patient might invoke Res Ipsa Loquitur if they wake up with an injury unrelated to their surgery, which couldn’t occur without negligence.
  • Falling Objects: If a pedestrian is injured by a falling object from a construction site, and such events usually do not happen if proper safety protocols are followed, the injured party may rely on Res Ipsa Loquitur.
  • Transportation Accident: If a passenger on a maintained elevator is injured due to an unexpected fall, this abnormal incident usually implies negligence in maintenance.

Frequently Asked Questions

How is Res Ipsa Loquitur applied in court?

Res Ipsa Loquitur applies when the plaintiff can show that negligence is the most probable cause of their injury, by presenting facts that make the inference of negligence more likely than not. The burden then shifts to the defendant to prove otherwise.

What are the requirements for Res Ipsa Loquitur?

The primary requirements are:

  1. The event must be of a kind that ordinarily does not occur in the absence of negligence.
  2. The instrumentality or agent causing the incident must have been under the defendant’s exclusive control.
  3. The injury must not have been due to any voluntary action or contribution by the plaintiff.

Can Res Ipsa Loquitur be used in any negligence case?

Not all negligence cases can use Res Ipsa Loquitur. It is typically invoked in exceptional circumstances where direct evidence of the defendant’s negligence is not available, and the facts of the incident itself strongly imply negligence.

Negligence

Failure to take proper care in doing something, which results in damage or injury to another.

Presumption

An assumed fact accepted on the basis of the probability provided by the law until disproved.

Exclusive Control

A situation where the defendant had sole control over the instrumentality causing the injury at the time of the incident.

Online Resources

Suggested Books

  • “Tort Law” by Kirsty Horsey and Erika Rackley: An accessible guide that covers negligence and other critical aspects of tort law.
  • “The Law of Torts” by Dan B. Dobbs, Paul T. Hayden, and Ellen M. Bublick: A comprehensive resource on tort law doctrines, including Res Ipsa Loquitur.

Fundamentals of Res Ipsa Loquitur: Business Law Basics Quiz

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Res Judicata
RES (Latin for 'thing')